Mechanical handsaw.



P. E. WHITE.

MECHANICAL HANDSAW.

APPLIOATIQN FILED 11011.19, 1913.

1,1 10,863. Patented Sept.15,1914.

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PRINCE EDWAFJ) TtI-IITI'L, 0F PERTH AHBOY, NEW JERSEY.

MECHNICAL HANDSA.

Specification of Letters Patent.-

Patented Sept, 15,

Appuuvn med November 19,1913. 'serial No. souri'.

To alt whom. it may concern.:

Be it known that I, PRINCE E. VVHrrE,.

a subject of the King of Great Britain, and residing at P erth- Amboy, in the county of Middlesex un'd State of New Jersey, have invented certain new and useful lnil'n'o'vements in Mechanical Handsaws,`

of which the following is a specification,

such as will enable those skilled in the art to which it appertains to rn-alie and use the same. i l

This invention relates to hand saws for use in work shops of various kinds and classes, and the object thereof is to provide :in improved device of thisclass which may be operated by compressed oir or other 'power medium, or by hand, and with this Fig. 3 a sectionon the line 3 3 of Fig. 2.,- .and on an enlarged scale; Fig, 4 a section en the line l-'-4 of Fig. l, and on an enlarged scale, and ;.Fi g. 5 a'transverse section on the line 5--5 of Fig. 2, and showv ing n. modilication and being also on an enlarged scale.

In the practice of my invention, I provide i an oblong frame a composed of parallel side members a2 and a which, for the purpose of this description, will be called front and back side members, and said side members are connected at the front and rear ends a* and a in any desired manner.

The back side member a3 is provided with n longitudinally movable slide b to the front end portion of which is secured a saw o, this` connection being preferably made hy means of screws ,c2 having thumb nutsv c, said screws being passed through the saw into the slide, but my invention is not limited to any particular means for connecting the saw c with the'slide b, and this connection may be made in any desired manner. The parta3. of the. frameV is provided with a groove d which is T-shaped in cross sec tion end whioh extends through the part a at one portion o f the same, to form a slot d. The slide b which is shaped similar tothe groove d 1s mounted in said groove, asshown in Fig. 2. This form of slide and its mount ing forms an inexpensive construction, in that only one piece of material is necessary for each part and vat the same time` it providcso structure in 'which the saw will be guided as `accurately as it ispossible to di rect a saw; Another desirable feature o1' the slide and mounting is that the parts may be quickly and easily assembledor tak'eii down and simply' lubricated; -Mounted transversely in the front side portioi of the frame, and forwardly of the middle thereof, in the construction shown, is a shaft e on the inner endef which is'mout- -ed and secured a wheel f-with which -is co'nnected at f2 a crank rod g-,which is connected with the slide l at g2, said crank rod beV- ing provided with a stud g3 movable-in thatpart d? of the groove-d which opens inwardly. The front side a? of the' frame is provided with a circular housing h through which the Shaft e'lpaSSe'S, and Said shaft e is provided within said housing with bucket wheel 'i havingradial blades i l forming buckets i, and the' housing h is provided on the rear side thereof with a coupling extension IL having. bore h3 and with which is connected a pipe o r pipe coupling 1' with which, in practice, is connected a flexible pipe jz through which air under i pressure is applied to the housing 71.. The

forwardly directed bearing k -in whichf-is mounted a tra. verse Shaft c2 having ztspur `liront end of the/'frame is provided with wheel k3, and the shaft'k" or thev ends thereof are movable forwardly and backwardly in the bea-ring lc, and rearwardly of said ends of said shaft are placed spiral springs.

fr* Awhich normally hold the spur` wheel k3 in its projected position, and at the back .ln Figs. l and 2, I have shown at 0 a Work i piece, and in the normal position of the wheel l'c, it projects beyond the plate, or the connected therewith is a curved' pipe teeth of the plate m, and Ain the be inning of the use of the saw, the teeth m2 o the-plate m are pressed against the work piece so as to facilitate the exact placing ofi-the saw on said worle piece, which has been previously marked for this purpose. This operation forces-the wheel k3 backwardly and when lthe saw .has been put in operation, pressure on the frame is removed and only the wheel k3 or the teeth thereof bear on the Work piece, and this facilitates the movement of the saw across the work piece either verti cally, or in any other direction that may be desired. With the construction shown in Figs. 1, 2 andV 3, air under pressure enters through the pipe j? and operates the wheel z', as will be readily understood, and the wheel i operates the shaft e which in turn operates the wheel f', and the saw c is operated by the crank rod g. The housing h is provided with an exhaust port p which is preferably lo: cated in the back bottom portion thereof aigri y which the exhaust air from the housiziig h may be used for the purpose of. blowing away sawdust from the'work piece. ,l ff

InFig. 5 of the accompanying drawing, I have shown a modification in which the means for operating the saw 'by"`:ompressed air including the housing -k is omitted, and the shaft e is provided in the front side aof` the frame with ball bearings '13 and saidshaft is also provided with a crank 1' by which it may be operated, and with this conhand, Y

struction, the saw maybe operated by as will be readily understood.

The frame d is provided at the rear side thereof, and at or near the front end vthereof with a ide within which the sawlworks, and which is intended to prevent the buckling or breaking of said saw, and Said frame is also provided, preferablyA on the back side thereof and near the rear end thereof,.with

' a handle t which is secured thereto longitudinally thereof, and by means of which the device may be held and controlled in the op eration thereof, and other handles may be provided if desired, 'and the wheel f and crank rod g may also be covered by hoods connected with the top andl bottom of the frame if desired, and while I have described the preferred form of my improvement as' operated by air, it will be understood that Y other power mediums may be employed, and

changes in and iinodifcations of the construction erein described may be made, within the scope of the appended'claims, without departing from the spirit of my invention or sacrificing its advantages. My invention is also not limited to the usel of a blade saw,

as shown, and any kind of a saw may be connected-,with the slide b.

Having fully described my invention,

what I claim as new and desire to secure by Letters Patent is 1. In a'hand saw device, a frame, a wheel .mounted therein, means for turning said wheel, a slide mounted in said frame and operated by said wheel, and a saw connected with said slide and adapted to be projected beypnd lone end of the `fiame, said end of the frame being also provided with a spur wheel A having spring projected bearings and at one side of which is a toothed blade beyond which the wheel is normally projected.

2. A mechanical saw comprising an oblong slide, the link -being also connectedv to the v wheel, a saw detachablyconnected` with one end of said slide, and means foroperating Said shaft.

3. A mechanical saw comprising an oblong frame composed of parallel s'ide members, one side member of said frame being rovided with a housing, a shaft mounted in said housing and extending into said frame, a wheel mounted on the said shaft between t'he side members Vof the frame, a T- shaped guide way provided on the opposite side member, a slot placing said guide way in communication with the inside of the frame, a T-shaped slide mounted in said guide way, a link provided in said frame and having 4'a part which extends throughsaid slot and is connected to said slide, the link being also connected to the wheel, a saw detachably connected to said slide, and mea-ns for operating said shaft.

In testimony 4that I claim the foregoingas my invention I have signed my name in piesence of the subscribing witnesses this {ifteenth'day of November 1913.

PRINCE EDWARD WHITE.

Witnesses:

A ELSIE LASKY,

JULIUs KoaANri. 

